Sleeve type relief valve



Nov. 6, 1951 A. F. ARNOLD 2,573,680

v SLEEVE TYPE RELIEF VALVE I Filed Dec. 13, 1945 2 SHEETSSHEET 1 FIGQI LII! ARTHUR F ARNOLD my id Nov. 6, 1951 A. F. ARNOLD 2,573,680

, SLEEVE TYPE RELIEF VALVE Filed DEC. 15, 1945 2 SHEETS-SHEET 2 FIG. 2

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Patented Nov. 6, 1951 A nea-m Patents-s ie-Le a ise. am

- ZfQlaims... (Cl. 137-53) .This ,inventionrelates to audiaphm m illqll i i'i I backepressure. valve; and pa fimlm $9, 1 u

aphragm operatedgvalve Qfl the concen i .SlfiW type whicheisadaptedto main ainauni oltinhec pressure on the. exhaust of. steamensm .9 ther fluid'systems and :whose operation is independent of anyfluctuationinpressur 01 P1 9 .t

of the valve. V n iap ragm. operated .va ves. fo ernainteeance of uniformback pressure on steam linesare known;- but whenitheyt are ofrthe concentric springs which, aretset to. maintain a uniform pressure. These. springs, are often. located with-e 7 in the body of:the-..valve. .and. are subject to th heataction ofthesteam andtsslq c betpmeg in their operation... The. valve. o1 this inve V is characterized by the .iact; that bcth th and movable. sleeves; are 01 .1 ende f. @K 9 51 pressure, regulating-rsprin v is remote.v or outside I of the valve body.and'. is-n t. afiec ed blt ib all e of the steam. .Thetfachthat the sleeves r open ended makes the valve immune to the fluctuations in pressure on the. exhaust side. thereof.

:With the defects of thempresentart. valves. in

mind it is, therefore, an object ofjthishiivention to provide a valve which will maintain a uniform pressure on the exhaust'of steamengines or other fluid systems.

' Itis also-an objectotthis-invention to provide a valve whi'ch is not-affected byuthe fluctuatiqns in pressure from-the exhaust .sidecof the valve;

It is a furtherobject of thisw invention .togprogvidea valve of sturdy construction, whichi is economical in manufacture, and efilcientginopergation.

These and other objectswill' be apparentgin the following specification; claims andsirr the accompanying drawings which show a preferred embodiment of the invention and in which:.

Figure 1 is a longitudinal vertical section taken on section line l-| of Fig. 2.

Figure 2 is a horizontal section on the median line of the valve body taken on section line 2-2 looking in the direction indicated by the arrows.

Figure 3 is a detail of the sleeves and is partly in section and partly in elevation.

Referring now to Figure 1, ll] represents the body of a standard valve which is provided with inlet port l2 and discharge port [4. Body [0 is provided with an internal partition-wall in the form of a cup providing a chamber [6 which is th leereswithi .e 'e il answ qncea tierw t ei lettpcr i .l 2 andex end zabeiit bre rzq ersh the-Ma QQ IQ JLPh iV Y Zb- QEG Chambe I .12 provi e wi h ali ned epe f n sg H i ton; and qt emv cr i -n .Mcun m penin I lists eev whic. erovide M 1 i aneeomiis. npe e whichi ada o" 9n th rtgpt pf rthewa i threaded engagements with nut 3L3;-

on upper diaphragm plate 35. The

of h p es u e. e t lla nesland, Z

.r e re .zt lius aesth ziipriiq le a e m heesieamr here h ws throu h discharge port I4.

Figure 3 shows the arrangement of the ports in the fixed sleeve and in that of the sliding sleeve 22; also the construction of these sleeves is illustrated. It is clear that each sleeve comprises a cylindrical member having a plurality of axially displaced zones, each zone comprising a plurality of circumferentially displaced arcuate slots. In the particular embodiment indicated in Fig. 2, three slots are provided in each zone separated by wall-partitions of the cylindrical member, so that each slot subtends slightly less than a arc.

In operation, steam from the exhaust line of a steam engine or other prime mover is admitted under the steel dome 33 through nipple 34. As the pressure builds up in the chamber between the upper side of diaphragm 28 and steel dome 33 to that set by spring 30, diaphragm 28 is graduallyg'depres sefd" and rod 26 is depressed thereby. The ports in" the fixed and movable sleeve uncover each other and gradually at maximum pressure are fully opened. Because of thelarge area of these ports and the small movement of the slides relative to each other, the 'steam' from the exhaust of the steam. engine passes rapidly from. inlet port [2 through the ports in.

each sleeve and thence to the condenser. It is readily apparent that fluctuation of pressurein the condenser, that is, fluctuation in the vacuum created by the condenser will have no effect on the operation of the sleeves with respect to each other.

While the description herein has been drawn to a pressure regulated valve for the exhaust line of a steam engine, it is not desired to be strictly limited thereto as this type of valve is applicable to other systems wherein a fixed pressure is desired to be maintained. For instance, the valve could be used in refrigerating systems for maintaining a uniform pressure on the refrigerating element. Furthermore, other constructions and arrangements of parts could be used without departing from the spirit r scope of the invention. Such other applications and constructions and arrangements are included within the scope of the invention to the extent as defined by the herewith appended claims. 7

'The invention herein described may be manufactured and used by or for the Government of the" United States for governmental purposes without the payment to me of any royalty thereon or therefor. 7

- I claim: I

'1. A-back pressure diaphragm operated valve for instantly equating the steam from the exhaust line to the pressure on the outlet side and provided with a diaphragm and a body having inlet-and outlet ports, said body including an internal cup-like wall providing a chamber therein, said chamber having aligned openings, a first open-ended sleeve passing through said chamber,

stages in response to pressure on the diaphragm inde-- pendently of fluctuation in pressure on the outlet side of the valve.

2. A diaphragm operated back-pressure regulating valve of a type described comprising a valve body provided with'inlet anfdv outlet ports, a bottom plate, a topplate, and a chamber inside said body in line with said inlet port and open thereto, said chamber extending toward said outlet port but terminating short thereof, said chamber having a pair of aligned openings in the 'top and bottom'thereof, a first open-ended sleeve comprising a cylindrical wall provided with lateral slots, said sleeve having a flange and threads on oppositeends thereof, said sleeve passing through said openings with said flange carried by said chamber, means engaging said threads for firmly securing said first sleeve to said chamber, a second open-ended sleeve comprising a cylindrical wall withlateral slots, each of said sleeves comprising a cylindrical member having a plurality of axially,

displaced zones, each zone comprising a plurality. of wall partitions dividing said zone into a plurality of circumferentially displaced slots, said second sleeve having spider means at the ends thereof, said second sleeve slidably fitting inside said first sleeve in close contact with the interior surface thereof, a steel frame mounted on said top plate, a dome member provided with an inlet. for a gaseous fluid, a diaphgram, said dome memri ber and said frame being secured together with said diaphragm therebetween, said diaphragm and dome forming a pressure chamber responsive. to the pressure of said fiuid, a rod secured to said,

spider means and extending from said spider means to said diaphragm and secured thereto,

said rod passing through an opening in said top plate, a packing gland on the outside of said top-plate and around said rod for sealing, the last said opening, and a coiled pressure-. regulatin spring outside of said gland spaced,

therefrom, said spring pressing said diaphragm outward, and means for adjusting said spring to fix the pressure on said diaphragm.

ARTHUR F. ARNOLD.

REFERENCES. .CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 853,081 Patterson Nov. 23, 1886 r 559,881 Ahrens 1 May 12, 1896 754,467 Lombard Mar. 15, 1904 1,286,397 Olsen. Dec. 3, 1918 1,612,567 Browne Dec. 28, 1928 1,729,819 Campbell Oct. 1, 1929 1,938,943 Terry Dec. 12, 1933 1,944,486 Bailey Jan. 23, 1934 2,371,428 De Giers Mar. 13, 1945 

